// Playground - noun: a place where people can play

var a = 5
var b = 2
var c = 0

a + b
a - b
a * b
a / b
a % b

+a
-b

let d = 5.2 , e = 1.7
d / e
d % e

Int.max
Int.min

a++
b--

a
b

++a

a += 2
a -= 2
a *= 2
a /= 2
a %= 2

a == b
a != b
a > b
a < b
a >= b
a <= b

let statusBarHeight = 20
let basicViewHeight = 548

var inFullScreenMode = true
var viewHeight = basicViewHeight + (inFullScreenMode ? statusBarHeight : 0)

var score = 58
var rate = score >= 60 ? "及格" : "不及格"


















